I feel this card actually helps with Arena quite a bit. It's a good pick in a minion heavy environment and it removes mage flexibility, which is arguably the best in arena. Sure, drafting a fireball is better. At the same time, this gives you another option at drafting removal which isn't inherently bad vs. not drafting any removal.

The one thing I thought Mage didn't need was another powerful removal spell on top of Fireball, Flamestrike, Pyroblast, Frostbolt, Flamecannon and more that I can't be asked to type out -_- I was hoping for fun cards like: 3 mana, turn a random minion into a 2/2 donkey (a card like polymorph rather than fireball for once) or maybe something a little more crazy like: 7 mana, transform all minions into a random minion of the same mana cost (maybe that's relying too much on RNG but you get the idea)